“When Jesus had said this, He was troubled in His spirit and testified, “I assure you: One of you will betray Me! ” The disciples started looking at one another — uncertain which one He was speaking about. One of His disciples, the one Jesus loved, was reclining close beside Jesus. Simon Peter motioned to him to find out who it was He was talking about. So he leaned back against Jesus and asked Him, “Lord, who is it? ”
John 13:21‭-‬25

Jesus, speaking about one of His disciples who would betray Him (vs 18), now becomes sad and visibly troubled in His spirit, now plainly states, “I assure you: One of you will betray Me!” The disciples begin to look at each other. Several ask, “Is it me?” John (sitting next to Jesus) and Simon Peter (who has to gesture and lean in towards Jesus) asks, “Lord, is it me? If not, who is it?” (Knowing Peter, he was ready to take out Jesus’ betrayer.)

As far as I can see, almost everyone EXCEPT for Judus was asking if he were the one who would betray Jesus. Imagine what would have happened (even though Judus had already made arrangements to sell Jesus out to the religious leaders) if Judus would have asked–or even gotten cold feet about the situation, and WOULD HAVE ASKED JESUS, “Is it me?” Judus almost seems self – justified in his decision.

KNOWING Jesus includes wanting to never let Jesus down. Knowing Jesus means NOT WANTING to betray Him!

Jesus knew Judus, even though Judus was that guy who would betray Him and Jesus was STILL TROUBLED to lose him! That’s how much He loves us and wants NONE of us to love with out Him (2 Peter 3:9)

Think about it!